Dubliner having his arm in cast (8)
I believe the answer is:
irishman
'dubliner' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'his arm in cast' is the wordplay.
'cast' indicates anagramming the letters (letters are dispersed or cast around).
'his'+'arm'+'in'='hisarmin'
'hisarmin' anagrammed gives 'IRISHMAN'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for irishman that I've seen before include "Dubliner, say" , "European" , "islander" , "Dublin native" , "Eg, Dublin male" .)